Patient: “I can’t see very far in these new glasses”
Optometrist takes him to the door: “What’s that up there?”
Patient: “The sun”
Optometrist: “How far do you want to f****** see!”
What are corrective lenses?
They are the default remedy our optometrist would recommend when they diagnose that you have refractive errors.
Everyone who has some kind of vision problems has probably worn a pair of corrective lenses once in his or her lifetime.
If you do not wear now, it is almost guaranteed that you will be recommended by your eye doctor to wear one for presbyopia as you age.
I have a love and hate relationship with my glasses.
I am grateful that it is invented as it solves a lot of my vision issues (even though temporary) before I discovered eye exercises and the importance of vision habits.
It is a truthful quick fix.
Pick it up from the table; put it on and wa la~ the world is crystal clear.
However, over-reliance will cause your eyesight to worsen over time.
You would have probably notice this when you upgrade your eyeglasses prescription every few years.
Today, I only wear them when I drive or if I have to watch a concert from far. Other times, I am perfectly fine without it.
Corrective lenses are designed to help your eyes to focus light properly onto your retina.
They do this by bending the light rays (before they enter the eye) to the degree required by your given condition.
Our prescription (learn how to read prescription here) is based on the degree to which light rays are bent and is measured in diopters.
Therefore, the greater the bending means higher prescription and thicker lens. It is further classified into plus and minus lens.
A measurement of 5.0 diopters for a nearsighted person (minus lens) will have -5.0 diopters in his prescription.
I have listed out brief descriptions of how corrective lens works for the different refractive errors.
For in depth details, please click on the links provided.
There are three main types of corrective lenses today. Glasses, contacts and intraocular lenses.
They are everywhere. You often see them hanging on the faces of people with vision problems.
It is especially prominent in Singapore where you see almost every kid wearing them.
Its body structure includes a body frame that holds two pieces of lenses together, two hands named temples which grab on to your ears and its body sits on the bridge of your nose.
After so many years of wearing and changing glasses, I had never find them comfortable.
It is like a foreign body that just does not belong there on my face. It is either too heavy on my nose or grabs too tightly on my ears.
There are several types of glasses, primarily:
These corrective lenses are worn on the eyes instead. They are usually made of plastics or silicon.
Honestly, I had never worn contact lens in my life.
Putting something directly on my eye is too scary for me to try. I am sort of a scary cat.
Plus the cost of disposable and burden of frequently washing reusable contacts with all kind of solution are just too troublesome and confusing to me.
Contact lenses come in:
intraocular lens is actually implanted into the eyeball.
Most intraocular lenses are monofocal, meaning that wearer can only see the distance that the lens is designed for. They are primarily made for nearsightedness but multifocal intraocular lenses do exist just much pricier.
The whole procedure of the placement takes about 30 minutes and the recovery time is usually about two to three weeks.
As intraocular lens is permanently inside, it does not require cleaning but it is important to note that during the recovery period, wearer should avoid doing anything that raises his or her blood pressure.
Corrective lenses are indeed one of the greatest creation in human's history.
It had saved many people from becoming legally blind. It had also helped people with severe refractive errors to see again.
What's important is to avoid over-dependent on them as they will worsen your eyesight.
An analogy will be liked depending on crutches even when your legs had recovered. It will waste the leg muscles away.
Use them wisely.